Add the libc glue and headers definitions for the *at() syscalls.

Based on the submission by rdivacky,
	sponsored by Google Summer of Code 2007
Reviewed by:	rwatson, rdivacky
Tested by:	pho

Author: kostikbel

include/stdio.h

@@ -449,5 +449,8 @@ extern int __isthreaded;
 #define	putchar_unlocked(x)	putc_unlocked(x, stdout)
 #endif
 
+#if __BSD_VISIBLE
+int	 renameat(int, const char *, int, const char *);
+#endif
 __END_DECLS
 #endif /* !_STDIO_H_ */

include/unistd.h

@@ -559,6 +559,17 @@ void	*valloc(size_t);			/* obsoleted by malloc() */
 extern int optreset;			/* getopt(3) external variable */
 #endif
 #endif /* __BSD_VISIBLE */
+
+#if __BSD_VISIBLE
+int	faccessat(int, const char *, int);
+int	fchmodat(int, const char *, mode_t, int);
+int	fchownat(int, const char *, uid_t, gid_t, int);
+int	fexecve(int, char *const [], char *const []);
+int	linkat(int, const char *, int, const char *, int);
+ssize_t	readlinkat(int, const char *, char *, size_t);
+int	symlinkat(const char *, int, const char *);
+int	unlinkat(int, const char *, int);
+#endif /* __BSD_VISIBLE */
 __END_DECLS
 
 #endif /* !_UNISTD_H_ */

lib/libc/sys/Symbol.map

@@ -334,6 +334,24 @@ FBSD_1.0 {
 	truncate;
 };
 
+FBSD_1.1 {
+	faccessat;
+	fchmodat;
+	fchownat;
+	fexecve;
+	fstatat;
+	futimesat;
+	linkat;
+	mkdirat;
+	mkfifoat;
+	mknodat;
+	openat;
+	readlinkat;
+	renameat;
+	symlinkat;
+	unlinkat;
+};
+
 FBSDprivate_1.0 {
 	___acl_aclcheck_fd;
 	__sys___acl_aclcheck_fd;

sys/sys/fcntl.h

@@ -272,6 +272,7 @@ __BEGIN_DECLS
 int	open(const char *, int, ...);
 int	creat(const char *, mode_t);
 int	fcntl(int, int, ...);
+int	openat(int, const char *, int, ...);
 #if __BSD_VISIBLE
 int	flock(int, int);
 #endif

sys/sys/stat.h

@@ -330,6 +330,12 @@ int	mknod(const char *, mode_t, dev_t);
 #endif
 int	stat(const char * __restrict, struct stat * __restrict);
 mode_t	umask(mode_t);
+#if __BSD_VISIBLE
+int	fstatat(int, const char *, struct stat *, int);
+int	mkdirat(int, const char *, mode_t);
+int	mkfifoat(int, const char *, mode_t);
+int	mknodat(int, const char *, mode_t, dev_t);
+#endif
 __END_DECLS
 #endif /* !_KERNEL */
 

sys/sys/time.h

@@ -321,6 +321,7 @@ int	lutimes(const char *, const struct timeval *);
 int	setitimer(int, const struct itimerval *, struct itimerval *);
 int	settimeofday(const struct timeval *, const struct timezone *);
 int	utimes(const char *, const struct timeval *);
+int	futimesat(int, const char *, const struct timeval [2]);
 __END_DECLS
 
 #endif /* !_KERNEL */